Carton



0. H. HULTI'N June 29, 1937.

CARTON Filed March 14, 1934 INVENTOR Patented June 29, 1937 UNITED STATES PATENT OFFICE.

CARTON Oscar n. Hultin, Quincy, Mass, 'assignor to Pneumatic Scale Corporation, Limited, Quincy, Mass, a corporation of Massachusetts Application March 14, 1934, Serial No. 715,502

Claims. (01. 229-14) This invention relates to a carton. thickness of carton forming material usually re- One object of the invention is to provide a ferred to as board, and to regulate the thickness novel and improved carton construction by which thereof to provide a body portion having a cera carton possessing the requisite strength for the tain minimum required strength. When such 5 packaging of different commodities may be proa carton is closed and sealed, both at its top and duced utilizing a minimum amount of carton bottom, the overlapping flaps provide a'sealed forming material, wherebya commercially satistop and bottom of much greater thickness and factory carton may be produced at minimum strength than that of the body-portion. In adcost. dition, the usual films of glue utilized in sealing [0 A fl rther Object of the nvent o s to provide the top and bottom flaps further increase the a novel and improved construction of carton in strength of these portions of the sealed package. which provision is made for supporting the top Referring now to the drawing, I have illusflaps Of the carton in a manner such as t0 facilitrated in Fig, 1 a, composite laminated cartontate the os g and sealing of t e top fl p blank made up of a plurality, and, as herein the carton. shown, of two laminations l2, ll, which in prac- I? W t these e e a bjec in w and such tice are adhesively secured together by glue or othe s as may h r inaft r app a t invention other suitable adhesive. one of the laminations consists in the carton hereinafter described and u is provided w th top flaps l5 d botto flaps particularly defined in the claims at the end of 3 which may be of any usuallor preferred form Lthis specification. designed when folded and sealed to close the In the drawing illustrating the Preferred top and bottom of the carton or package, respecbodiments of the inventi n. F 1 is a P of tively, and the second lamination I2 is arranged a carton blank for Producing the Present carton; to form with that portion of the first lamination i 2 is a. side elevation of the same; Fl 3 is a to which it is adhesively secured, a composite cross-sectional view through the body of a carbgdy portion 9 of increased strength and t 5 11011 embody the p s invention; 4 1S ness as compared to the thickness of the individperspective illustrating the present carton with vual topand bottom s |5, A t e 3 9 fl p p preparatory to being In practice, I also preter to provide the lamiand sealed: an Fi 5 ise perspective illustratmg nation l2 with a side sealing flap 2 0 which "is v a completely closed and sealed carton produced adapted to overlap upon and to be udhesively from the blank shown in Fi 1. secured to the opposite panel-22 of the lamina- R the Packaging industry cartons have PP tion I2 when the carton is made up, and I also generally used for packaging Various commodltles' prefer to adhesively secure the two laminatlons and various thicknesses of board have been used so as to cause the overlapping side seam in the construction of cartons of the requisite 23 u of the lamina-Hons n, I to be located at stren t depending n t denslty of the different corners of the carton. -As illustrated ferent commodities and the size of the packag in Fig. 3 such overlapping portions 23, 24 are and experience has shown that for the difierent arranged at diagonally opposed corners of the classes of'commodities various minimums exist carton as to the eq board thickness- In order to provide a support upon which the 40 I have discovered, however, that a commercialtop flaps of the carton may b folded down 1y Sat s a carton and Package y be ing the closing and sealingvof the top flaps of the du by laminating the carton formmg mate carton to insure the proper adhesive contact berial in suqh manner that the W portmn of tween the successively folded down top flaps l6, carton Package is made p of at least two as herein shown, the lamination I2 is arranged laminatlons the carton formmg material while to extend a short distance above the score lines the flap forming portions of the carton at one or 26 on which the top flaps are to be folded, to

om osed of at least e le g r iiuti bi r lg i i ngsitfns 0 material, therethereby form indlvidua-l foldable portions The r n mi s to be 'eflected portions 28 are not adhesively secured to the flaps i t rfie mir i fi b o fd 322d in producing a carand, as a result, after the carton has been made ton and package of required minimum strength. up and the bottom closed in the usual manner Viewed f a different Point of V ew th y the folding and sealing of the bottom flaps I8, mercial practice has heretofore been to conthen the supporting flaps 28 are folded into-the 5 smwt a carton of an unlaminated and' single I position illustrated in Fig. 5 in which the supporting flaps 28 cooperate to form in effect a shelf or marginal supporting member for facilitating the folding of the successive top flaps I6, as above described.

Prior to the present invention, it has oftentimes been the experience that the endtop flaps oftentimes become bent and distorted during the formation and handling of the carton blanks and of the cartons formed from the blanks and, as a result, after having been folded down in the usual top sealing machine, these end top flaps have oftentimes assumed aposition below the plane of the top of the body portion of the carton so that when the remaining top flaps were folded down and. attempt was made to adhesively secure the folded top flaps, the position of the end top flaps, as above described, prevents the adherence of the flaps irrespective of the amount of pressure that might be commercially applied to the flaps. As a result, defectively sealed cartons and packages have been oftentimes produced. By the provision of the supporting shelf formed by the supporting flaps 28, as illustrated in Fig.

5, it will be observed that when the first two top flaps are folded down, they are supported upon the supporting flaps 28 and prevented from extending down into the body of the carton below the plane of the top of the body portion, and when the remaining top flaps are subsequently folded and pressed against the previously folded top flaps to adhesively secure the flaps together, the supporting. shelf formed by the supporting flaps 28 affords a substantial support against which the fiaps may be pressed, thus contributing to the efiicient and successful sealing of the top flaps of the carton.

In some instances I may prefer to laminate the carton blank with a lamination l2 of a size such as to extend a short distance belowthe score lines between the bottom flaps and the body of the carton, such as is illustrated in Fig. 1,'to form a series of bottom flap supporting members 30. When the bottom flaps of the carton blank are folded and sealed forming a carton suchas is illustrated in Fig. 5, the bottom flap supporting members 30 provide additional reenforcement for the bottom score lines of the carton, and particularly when cartons of large capacity and size are made this bottom flap reenforcement contributes materially to the strength V of the carton while permitting the laminations to be composed of minimum board thickness.

While the preferred embodimentsof the invention have been herein illustrated and described, it will be understood that the invention may be embodied in other forms within the scope of the following claims.

Having thusv described the invention, what is claimed is: I

1. As a new article of manufacture, a carton provided with a body portion having top flaps for closing the top of the body portion, and supportingmembers forming a part of said body portion andfolded to form a marginal supporting member within and'adjacent to said top flaps to thereby form a support for the top flaps when the latter are folded down to close the top of extending a short distance above the top of the body portion to form foldable flap supporting .for closing the top of the body portion and bottom flaps for closing the bottom of the body portion, and supporting members forming a part of said body portion and adapted to be folded inwardly to form reenforcements for the bottom score lines and bottom flaps of the carton.

5. As a new article of manufacture, a carton having a body portion composed of two imperforate sheets adhesively secured together and forming laminations, the outer lamination having top and bottom flaps integral therewith, the inner lamination being provided with foldable members at the top and bottom thereof extending a short distance above and below the top and bottom of the body portion to form foldable flap supporting members for the purpose specified.

6. As a new article of manufacture, a carton having a body portion composed of two imperforate sheets adhesively secured together and forming laminations, the outer lamination having top and bottom flaps integral therewith,,the

members at the bottom thereof extending a short distance below the bottom score lines of the carton to form foldable flap supporting members for the purpose specified.

'7. As a new article of manufacture, a carton blank composed of two imperforate sheets adhesively secured together and forming laminations, the outer lamination being provided with top and bottom flaps, the inner lamination being of a height corresponding to the body portion of the carton and provided with foldable portions adapted to form iiap supporting members for the purpose specified.

8. As a new article of manufacture, a carton blank composedof two imperforate' sheets adhesively secured together and forming laminations, the outer lamination being provided with top and bottom flaps, the inner lamination being of a height corresponding to the body portion of the carton and provided at its upper and lower portions with foldable flap supporting members for the purpose specified.

9. A carton blank comprising an outer lamination having top and bottom flaps and a plurality of side wall panels, an inner lamination having a similar number of side wall panels secured to said outer lamination but laterallyoil'- settherefrom'to provide both laminations with overlapping portions and free portions, each of said portions having an equal number of panels, and side sealing flaps carried by a vertical edge of each of said laminations, said side sealing flaps extending in the same lateral direction, whereby, when the blank is folded, the side seal-' ing flaps aredisposed at diagonally opposed cor-'- ners-of the carton.

10. A carton blank comprising an outer lamination having top and bottom flaps and a plu- 2,030,405 rality of side wall panels, aninner lamination tion, the said side sealing flaps being arranged with respect to one another and with respect to the side wall panelsof the outer lamination so that when the blank is folded, the side sealing flaps are disposed at diagonally opposed comers 5 of the carton.

OSCAR: H. HULTIN. 

